Recommended Construction Methods and Details

The construction of frost-protected shallow foundations (FPSF) is similar to that of conventional foundation construction except for the insulation details. Many of the steps, such as rough grading, foundation layout, the preparation of subgrade, wall forming, steel reinforcing and casting of the concrete, are all similar to conventional practices.

FPSF can be constructed using one of many approaches, including a monolithic slab-on-grade, an independent slab and stem wall, or a permanent wood foundation. Although the details discussed here illustrate techniques for the construction of new homes, the FPSF technique can also be applied to additions to homes with existing conventional foundations, and even walk out basements.

The FPSF construction details presented here reflect satisfactory practices for several typical situations. The drawings shown are generic in that they must be modified to meet the requirements specific to the site, such as insulation dimensions. Of key importance is the proper placement and sizing of the insulation.

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